You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

Spells you control can't be countered. At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Flying At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature or pays 3 life.

Skip your draw step. Whenever you discard a card, exile that card from your graveyard. Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.

At the beginning of your upkeep, you draw a card and you lose 1 life.

{1}, {T}: Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

Commander creatures you own have "Whenever this creature attacks a player, if no opponent has more life than that player, put a +1/+1 counter on this creature. It gains deathtouch and indestructible until end of turn."

{T}, Discard a card: Up to one target creature can't be blocked this turn. Whenever Key to the City becomes untapped, you may pay {2}. If you do, draw a card.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip {0}

Equipped creature can't be blocked except by Walls. Equip {2}

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.) Equip {1}

When Thieves' Tools enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Equipped creature can't be blocked as long as its power is 3 or less. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature has nonbasic landwalk. (It can't be blocked as long as defending player controls a nonbasic land.) Equip {2}

{T}: Add {C}. {3}, {T}: Target creature with power 3 or less can't be blocked this turn.

Barren Moor enters the battlefield tapped. {T}: Add {B}. Cycling {B} ({B}, Discard this card: Draw a card.)

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

Desert of the Glorified enters the battlefield tapped. {T}: Add {B}. Cycling {1}{B} ({1}{B}, Discard this card: Draw a card.)

Mortuary Mire enters the battlefield tapped. When Mortuary Mire enters the battlefield, you may put target creature card from your graveyard on top of your library. {T}: Add {B}.

Peat Bog enters the battlefield tapped with two depletion counters on it. {T}, Remove a depletion counter from Peat Bog: Add {B}{B}. If there are no depletion counters on Peat Bog, sacrifice it.

Polluted Mire enters the battlefield tapped. {T}: Add {B}. Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

({T}: Add {B}.)

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Enchant creature you control When Aspect of Lamprey enters the battlefield, target opponent discards two cards. Enchanted creature has lifelink.

Whenever Ayara, First of Locthwain or another black creature enters the battlefield under your control, each opponent loses 1 life and you gain 1 life. {T}, Sacrifice another black creature: Draw a card.

Equipped creature has deathtouch and lifelink. Equip {2}

Whenever a Swamp enters the battlefield under your control, choose one — • You draw a card and you lose 1 life. • Dread Presence deals 2 damage to any target and you gain 2 life.

Each opponent loses X life. You gain life equal to the life lost this way.

When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Prototype {1}{B}{B} — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Menace, lifelink Ward—Pay life equal to Phyrexian Fleshgorger's power.

Flying Whenever a creature an opponent controls dies, you may gain 3 life. Whenever an opponent discards a card, you may gain 3 life.

Flying Drain Life — When Shard of the Nightbringer enters the battlefield, if you cast it, target opponent loses half their life, rounded up. You gain life equal to the life lost this way.

{T}: Add one mana of any color in your commander's color identity.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever you tap a Swamp for mana, add an additional {B}.

Add {B}{B}{B}.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Secrets of the Soul — {T}, Sacrifice another creature: Add an amount of {B} equal to the sacrificed creature's mana value.

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Nyx Lotus enters the battlefield tapped. {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Whenever a creature an opponent controls dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") At the beginning of your upkeep, if you control ten or more Treasures, you win the game.

{T}: Add {C}{C}.

{T}, Sacrifice a black or artifact creature: Add an amount of {B} equal to the sacrificed creature's mana value.

Target creature gets -1/-1 until end of turn for each Swamp you control.

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Whenever you pay life, put that many blood counters on Font of Agonies. {1}{B}, Remove four blood counters from Font of Agonies: Destroy target creature.

Destroy target nonartifact creature.

Change the target of target spell with a single target. You lose life equal to that spell's mana value.

Destroy target creature. You lose 2 life.

+4: Target player exiles a card from their hand. −3: Exile target permanent. −14: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn Liberated. Then put those cards onto the battlefield under your control.

Destroy target creature.

When Ravenous Chupacabra enters the battlefield, destroy target creature an opponent controls.

Destroy target creature or planeswalker. Awaken 4—{5}{B}{B} (If you cast this spell for {5}{B}{B}, also put four +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)

Destroy target nonartifact, nonblack creature. It can't be regenerated.

All nonsnow creatures get -X/-X until end of turn, where X is the number of snow permanents you control.

Destroy all creatures. They can't be regenerated. Draw a card for each creature destroyed this way. Cycling {3}{B}{B} ({3}{B}{B}, Discard this card: Draw a card.) When you cycle Decree of Pain, all creatures get -2/-2 until end of turn.

Each player exiles all creature cards from their graveyard, then sacrifices all creatures they control, then puts all cards they exiled this way onto the battlefield.

Trample Whenever a source deals damage to Phyrexian Obliterator, that source's controller sacrifices that many permanents.

Flying Whenever one or more creatures deal combat damage to you, each opponent sacrifices a creature that dealt combat damage to you this turn. The Ring tempts you. Discard a card: Witch-king of Angmar gains indestructible until end of turn. Tap it.

All Rats have fear. {T}, Sacrifice a Rat: Create X 1/1 black Rat creature tokens, where X is the number of Rats you control.

Whenever another nontoken creature dies, you may create a 1/1 black Rat creature token. Rats you control have deathtouch.

As an additional cost to cast this spell, discard a card or pay 3 life. Destroy target creature or planeswalker.

Black creature spells you cast cost {1} less to cast. Whenever you cast a creature spell, each opponent loses 1 life and you gain 1 life.

Flying At the beginning of your end step, exile the top card of each opponent's library. You may play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any color to cast it. Whenever a nonland permanent an opponent owns enters the battlefield under your control, they lose life equal to its mana value.

{2}, {T}: Add {B} for each Swamp you control.

Add {B}{B}{B}. Threshold — Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.

At the beginning of your upkeep, the Ring tempts you. Whenever you choose a creature as your Ring-bearer, you may pay 2 life. If you do, draw a card.

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity. Equip commander {3} Equip {5}

At the beginning of your upkeep, Creeping Bloodsucker deals 1 damage to each opponent. You gain life equal to the damage dealt this way.

{B}{B}: Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)

Prevent all combat damage that would be dealt to attacking creatures you control.

Imprint — When Extraplanar Lens enters the battlefield, you may exile target land you control. Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

+1: Target player discards a card. −2: Search your library for a card, then shuffle and put that card on top. −8: Put all creature cards from all graveyards onto the battlefield under your control.

{1}, {T}: Untap another target artifact. {3}, {T}: Target creature can't be blocked this turn.

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Minas Morgul, Dark Fortress enters the battlefield tapped. {T}: Add {B}. {3}{B}, {T}: Put a shadow counter on target creature. For as long as that creature has a shadow counter on it, it's a Wraith in addition to its other types. (A creature with shadow can block or be blocked by only creatures with shadow.)

Whenever you tap a Swamp for mana, add an additional {B}. {B}: Nirkana Revenant gets +1/+1 until end of turn.

Whenever a creature deals damage to you, destroy it.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Landfall — Whenever a land enters the battlefield under your control, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis, the Fallen.

Put all creature cards from all graveyards onto the battlefield under your control.

{1}: Look at the top three cards of your library, then put them back in any order. {T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Equipped creature gets +1/+1 and has trample and lifelink. {1}: Permanents your opponents control lose hexproof and indestructible until end of turn. Equip {2}

{T}: Add {B}. {B}, {T}: Target legendary creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Enchant creature Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.) When Sleeper's Guile is put into a graveyard from the battlefield, return Sleeper's Guile to its owner's hand.

When you cast this spell, any player may pay half their life, rounded up. If a player does, counter Temporal Extortion. Take an extra turn after this one.

As The Black Gate enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped. {T}: Add {B}. {1}{B}, {T}: Choose a player with the most life or tied for most life. Target creature can't be blocked by creatures that player controls this turn.

Flying Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) At the beginning of your upkeep, if you have the city's blessing, reveal the top card of your library and put it into your hand. Each opponent loses X life and you gain X life, where X is that card's mana value.

Each land is a Swamp in addition to its other land types.

Deathtouch Boast — {1}{B}: Target player searches their library for a card, then shuffles and puts that card on top. (Activate only if this creature attacked this turn and only once each turn.)

Flying {B}, Pay 2 life: Target creature gets -1/-1 until end of turn. Whenever you lose life, draw that many cards. (Damage causes loss of life.)